1) f refers to : a) focal length b) radius of mirror c) center of curvature d) focus point e) vertex f) none of the above 2) F refers to : a) radius of mirror b) center of curvature c) focus point d) vertex e) focal length f) none of the above 3) xi refers to : a) radius of mirror b) focal length c) none of the above d) center of curvature e) image position f) object position  4) xo refers to : a) none of the above b) radius of mirror c) focal length d) center of curvature e) image position f) object position

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